Safety Data Sheet
Oil Tanker Cleaning (Compartment Based) CGII Site Operating Procedures
- Tend to Corporate Health, Safety, and Environmental requirements.
- Define and isolate the work area(s).
- Record the fluid volume contained within the tank, the tank capacity (bbl size), and determine if the service fluids are sweet (not bearing hydrogen sulfide) or sour (those bearing hydrogen sulfide).
- Isolate the work area.
- Drain free volumes from the compartments to be cleaned.
- If required, arrange for a supplied air trailer on location.
- If required, open the top hatch and purge the tank with air or nitrogen.
- Remove the access hatch and test for atmospheric properties. Equip workers with supplied air.
- Insert a gamma-jet agitator into the compartment.
- Reinstall the access hatch to limit spraying.
- Confirm the presence of a hotsie (or equivalent pressurized heating device). Alternatively, water can be pre-warmed in a holding tank. Fluids must be in the 160 to 185 Fahrenheit range to effectively remove oils and contaminants. The hotter the fluid, the easier cleaning will be.
- Understand the historical water volumes required to clean the compartment, using this as a starting point. CG-100 concentrations should be mixed at 3.0 – 5.0% by volume and optimized based on cleaning observations.
- Slipstream the treating chemical into the hotsie feed stock.
- Cycle hot treating fluid through the hotsie at maximum rate and pressure for the gamma jet for a period of 0 to 2.0 hours (timing is dependent on factors such as oil viscosity, vessel size, and hotsie throughput).
- Use a vacuum truck to remove the liquids from the bottom of the tank.
- Remove the access panel and assess for residual oil on the walls.
- If required, pressure wash the tank walls under the protection of supplied air.
- Squee-gee remaining fluids from the tank bottom. Remove cleaning equipment from the tank.
- Fully re-install the access panel, secure it, and prepare the compartment to be returned to service.